Goulds Pumps 3180-86 - IOM - Manual (Page 36)

2. Rotate the indicator through the top-center position to the right side, 180° from the start position
(3 o’clock).
3. Record the indicator reading.
When the reading value is... Then...
Negative The coupling halves are farther apart on the right side than
the left. Perform one of these steps:
• Slide the shaft end of the driver to the left.
• Slide the opposite end to the right.
Positive The coupling halves are closer together on the right side
than the left. Perform one of these steps:
• Slide the shaft end of the driver to the right.
• Slide the opposite end to the left.
Y X
Figure 10: Top view of an incorrect horizontal alignment
4. Repeat the previous steps until the permitted reading value is achieved.
Perform parallel alignment for a vertical correction
Before you start this procedure, make sure that the dial indicators are correctly set up.
A unit is in parallel alignment when the parallel indicator (P) does not vary by more than 0.002 in.
(0.05 mm) as measured at four points 90° apart at the operating temperature.
1. Set the parallel alignment indicator to zero at the top-center position (12 o’clock) of the driver
coupling half.
2. Rotate the indicator to the bottom-center position (6 o’clock).
3. Record the indicator reading.
When the
reading value
is...
Then...
Negative The pump coupling half (X) is lower than the driver coupling half (Y). Remove
shims of a thickness equal to half of the indicator reading value under each driver
foot.
Positive The pump coupling half (X) is higher than the driver coupling half. Add shims of
a thickness equal to half of the indicator reading value to each driver foot.
NOTICE:
You must use an equal amount of shims with each driver foot to prevent misalignment. Failure to do
so can result in equipment damage or decreased performance.
Y X
Shims
Figure 11: Side view of an incorrect vertical alignment
Installation
34 Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual